Re: Agent/Editor
Novel length: 50,000 is about as low as you can go, unless it's something like The Time Machine, which everyone already knows about so it isn't a sales problem.
A book that's 120,000 words long is not a problem if you're an established author with lots of enthusiastic readers, because the publisher gets substantial economies of scale on books with high print runs.
If you're Joe Schmoe, nobody's ever heard of you before, and the default promotion every conventional publisher does for every title is only going to wind up selling four or five thousand copies of your book, the economies of scale are not going to be on your side, and 120,000 words may be hard to justify. Ninety thou is easier.